晴天大气传导电流是大气离子在()作用下形成的电流。
参考答案:电场
阅读下面四篇材料,请从各题所给的A, B, C, D 四个选项中选出一个最佳答案。
小题1:Auntie Chang’s Dumpling House is in .
A.China
B.England
C.the USA
D.Japanese小题2:Auntie Chang’s has specials every day .
A.in the morning
B.at noon
C.in the evening
D.at night小题3:Which of the following is TRUE about the Dumpling House?
A. It is the Top 100 Japanese Restaurants in the USA .
B .We can order for dumplings on-line.
C. The Dumpling House is for the Chinese only.
D. The phone number of Auntie Chang’s Dumpling House is 713-514-8410 .
水分子的物理化学性质与植物生理活动有何关系?